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There is a 5% chance that a quantum mechanic carries a large box[1]. Upon opening the box, a housecatnamed"Schroedinger's Cat" is generated and has a 50% chance of being dead (in which case you see its corpse inside the box) and a 50% chance of being alive (it will be peaceful). The state of the cat is not determined until the box is opened. In fact, before opening, the large box will be empty in terms of gameplay. There is nothing special about this cat; it is just a physics joke.

This monster's name is a play on words with "Quantum Mechanics", a branch of physics. The messages that accompany the monster's teleporting attack and the toggling of intrinsic speed are jokes based on the Heisenberg uncertainty principle, which states that measuring the position of a particle makes its velocity more uncertain, and vice versa. Toggling the speed intrinsic could also be a reference to the transitions that occur between discrete energy levels in quantum mechanics.

Schrödinger's cat is a famous thought experiment in quantum mechanics involving imagining locking a cat in a box with a mechanism that has a 50% chance of killing the cat, depending upon the final state of a quantum system, for example whether an unstable nucleus has decayed within a certain time. The orthodox Copenhagen interpretation of quantum mechanics asserts that the cat in the box is in a superposition of possible outcomes, in half of which the cat is dead, and half of which it is alive. Only when the box is opened and "observed" does the quantum wavefunction collapse, and the fate of the cat become determined. Schrödinger asserted that this was absurd, and thus so was the Copenhagen interpretation. Physicists are still divided on this matter. Note that this was a thought experiment; no actual cats were killed, or even half-killed.